81754280

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{12539}}^1$

素因数の和:12713

約数の個数: 32

約数和(自身を含む): 185090400

約数和(自身を除く): 103336120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 12539, 25078, 50156, 62695, 100312, 125390, 250780, 501560, 2043857, 4087714, 8175428, 10219285, 16350856, 20438570, 40877140, 81754280]

約数ペア:

[(1, 81754280), (2, 40877140), (4, 20438570), (5, 16350856), (8, 10219285), (10, 8175428), (20, 4087714), (40, 2043857), (163, 501560), (326, 250780), (652, 125390), (815, 100312), (1304, 62695), (1630, 50156), (3260, 25078), (6520, 12539)]